The PCM sets DTC P0141 when it senses that resistance value of downstream O2 sensor heater is higher than threshold value.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Heater current check. | 1. Poor connection 2. Open or short to ground in power circuit 3. Open in control circuit 4. HO2S(S2) 5. Corrosion |
Enable Conditions |
•
Battery voltage : 10.7V ~ 16.1V.
•
Exhaust Gas temperature : 350 ℃(662 °F) ~ 600 ℃(1112 °F).
•
Engine stop time greater than 120 sec.
•
IAT greater than -9.8 ℃. | |
Threshold Value |
•
Internal resistance value greater than Threshold value. | |
Diagnostic Time |
•
15 sec. | |
Mil On Condition |
•
2 driving cycles. |
※ S1 : upstream oxygen sensor / S2 : downstream oxygen sensor
